The Role of Large Conformational Changes in Efficient Ultrafast Internal Conversion:  Deviations from the Energy Gap Law

2004 ◽  
Vol 126 (12) ◽  
pp. 3789-3794 ◽  
Author(s):  
Henk Fidder ◽  
Matteo Rini ◽  
Erik T. J. Nibbering
Keyword(s):  
Conformational Changes ◽  
Internal Conversion ◽  
Energy Gap ◽  
Energy Gap Law

The 1Bu+→3Ag-→1Bu-→2Ag- internal conversion in carotenoids following the energy-gap law identified by 5fs spectroscopy

2006 ◽  
Vol 422 (1-3) ◽  
pp. 95-99 ◽  
Author(s):  
Mitsuhiro Ikuta ◽  
Atsushi Yabushita ◽  
Ferdy S. Rondonuwu ◽  
Junji Akahane ◽  
Yasushi Koyama ◽  
...  
Keyword(s):  
Internal Conversion ◽  
Energy Gap ◽  
Energy Gap Law

[Ru(bpy)3]2+* and other remarkable metal-to-ligand charge transfer (MLCT) excited states

2013 ◽  
Vol 85 (7) ◽  
pp. 1257-1305 ◽  
Author(s):  
David W. Thompson ◽  
Akitaka Ito ◽  
Thomas J. Meyer
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Energy Gap ◽  
Hybrid Approach ◽  
Medium Effects ◽  
New Approach ◽  
Dye Sensitized ◽  
Ligand Charge Transfer ◽  
Energy Gap Law

In 1974, the metal-to-ligand charge transfer (MLCT) excited state, [Ru(bpy)3]2+*, was shown to undergo electron transfer quenching by methylviologen dication (MV2+), inspiring a new approach to artificial photosynthesis based on molecules, molecular-level phenomena, and a “modular approach”. In the intervening years, application of synthesis, excited-state measurements, and theory to [Ru(bpy)3]2+* and its relatives has had an outsized impact on photochemistry and photophysics. They have provided a basis for exploring the energy gap law for nonradiative decay and the role of molecular vibrations and solvent and medium effects on excited-state properties. Much has been learned about light absorption, excited-state electronic and molecular structure, and excited-state dynamics on timescales from femtoseconds to milliseconds. Excited-state properties and reactivity have been exploited in the investigation of electron and energy transfer in solution, in molecular assemblies, and in derivatized polymers and oligoprolines. An integrated, hybrid approach to solar fuels, based on dye-sensitized photoelectrosynthesis cells (DSPECs), has emerged and is being actively investigated.

Role of spectrin in membrane fusion and in shape change of human erythrocyte ghost

1978 ◽  
Vol 36 (2) ◽  
pp. 328-329
Author(s):  
Hideo Hayashi ◽  
Yoshikazu Hirai ◽  
John T. Penniston
Keyword(s):  
Conformational Changes ◽  
Human Erythrocyte ◽  
Shape Change ◽  
Membrane Surface ◽  
Slight Modification ◽  
Active Role ◽  
Main Role ◽  
Bank Blood ◽  
Human Erythrocyte Ghost

Spectrin is a membrane associated protein most of which properties have been tentatively elucidated. A main role of the protein has been assumed to give a supporting structure to inside of the membrane. As reported previously, however, the isolated spectrin molecule underwent self assemble to form such as fibrous, meshwork, dispersed or aggregated arrangements depending upon the buffer suspended and was suggested to play an active role in the membrane conformational changes. In this study, the role of spectrin and actin was examined in terms of the molecular arrangements on the erythrocyte membrane surface with correlation to the functional states of the ghosts.Human erythrocyte ghosts were prepared from either freshly drawn or stocked bank blood by the method of Dodge et al with a slight modification as described before. Anti-spectrin antibody was raised against rabbit by injection of purified spectrin and partially purified.

scholarly journals Role of conformational heterogeneity in ligand recognition by viral RNA molecules

2021 ◽  
Author(s):  
Lev Levintov ◽  
Harish Vashisth
Keyword(s):  
Conformational Changes ◽  
Ribonucleic Acid ◽  
Viral Rna ◽  
Ligand Recognition ◽  
Conformational Heterogeneity ◽  
Rna Molecules ◽  
Environmental Stimuli

Ribonucleic acid (RNA) molecules are known to undergo conformational changes in response to various environmental stimuli including temperature, pH, and ligands. In particular, viral RNA molecules are a key example...

Conformational Changes of Yeast Plasma Membrane H+-ATPase during Activation by Glucose:  Role of Threonine-912 in the Carboxy-Terminal Tail†

Biochemistry ◽  
2005 ◽  
Vol 44 (50) ◽  
pp. 16624-16632 ◽  
Author(s):  
Silvia Lecchi ◽  
Kenneth E. Allen ◽  
Juan Pablo Pardo ◽  
A. Brett Mason ◽  
Carolyn W. Slayman
Keyword(s):  
Plasma Membrane ◽  
Conformational Changes ◽  
Yeast Plasma Membrane ◽  
Carboxy Terminal

Diffusional distortion of the free‐energy gap law

1995 ◽  
Vol 103 (18) ◽  
pp. 7927-7933 ◽  
Author(s):  
A. I. Burshtein
Keyword(s):  
Free Energy ◽  
Energy Gap ◽  
Energy Gap Law
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